Out-trapping fly-escape screen.



PXTENT @FLGE HENRY A. HANSON, OF GRANO, NORTH DAKOTA.

OUT-TRAPPING FLY-ESCAPE SCREEN.

Specication of Letters Patent.

Patented Sept. 190B.

Application filed December 23, 1907. Serial No. 407,821.

T o all whom 'it may concern:

Beit known that l, HENRY A. HaNsoN, a citizen of the United States, residing at Grano, in the county of Ward andV State of North Dakota, have invented certain new and useful Improvements in Out-Trapping lily-Escape Screens; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap ertains to make and use the same.

ily invention has for its object to provide an efficient, simple and cheap foi-moi out-l tra ping ily escapel screen window or door; an to this end consists of the novel features of construction hereinafter described and deiined in the claim.

The invention is illustrated in the accom! is a view in longitudinal section through the entirewindow with a portion broken away. Fig. 3 is a view in section through a portion of the window on the same line as Fig. 2 hut on a larger scale; and Fig. 4 is a similar view to Fig. 3, `lout shows some of the parts separated.

'lhe numeral l indicates the screen frame, and the numeral 2 the main body portion of a screen which is secured to said iframe by clamping strips 1a. 'lhe up er edge oi the screen .2 terminates a considerable distance helow the transverse upper bar of the frame l and is adapted tov be rigidly held between a pair of clam ing hars 3, one of which may he permanent y secured to the sides of the trarne l, and the other of which should be detachably secured thereto. The said cla1nping hars 3 also clamp and hold the lower edge oi the supplemental screen section' l, the upper transverse edge of which is secured to the transverse upper oar of the trame l by a clamping strip 5. 'lhe supplemental screen section l is so pressed or shaped as to afford a series of conical pockets ll, each oi whichl is provided with a ily escape passage el at its tip or extreme upper enel. 'llhe mouths or downwardly flaring lower portions ol these pockets 4a open up to the interior of the screened window, as clearly shown in the drawings. T he clamping strips 1a and 5 will preferably be secured to the frame 1 by hrads or small nails, while the clamping hars 3 will usually be secured together hy rivets, hut may be detachahly connected by means of small nutted bolts. The said clamping bars 3 stiften the upper portion of the screen and, what is more important, make it possible to quickly and easily apply the pocket-equipped supplemental screen section to an ordinary screen simply first cutting away the upper portion of the said screen.

lWith the screen constructed as alcove de scribed it is, of course, obvious that lilies, traveling over the inner surface of the screen, can enter the mouths of the pockets, and if they continue their travels to the tips thereol, can pass out through the o enings #lb therein and will then lind thenise ves on the outside oli the screen. it will then he very diilicult for thehies to again reenter the screen through Vthese small openings in the tips of the pockets as in attempting to do so they will walk over the tips or conical ends ol the pockets. lt should be noted that the protruding-portions of the conical pockets Ll stand outward or away from the exterior 'face ot the main portion of the screen and screen frame, hence illes which gather on the outer or exterior surface o the screen door or window cannot well iinil the o cnings to the tips of the pockets, hut will he ed away troni the saine in their travel over the screen. it is, of course, also obvious that the said conical pockets can he formed by properly 'iolding and shaping marginal sections oi the screen over suitable iormcrs.

What l claim is:

:ln an out-trapping ily escape screen for windows and doors, the combination with a rectangular marginal 4lrarne, a main-hotly screen secured to said trarne lout terminating at its upper edge below the transverse upper har of said --frame, a supplemental screen section secured at its upper edge to the transverse upper har of said trarne and provided with a multiplicity ol conical pockets extending upward from the lower edge ci the upper bar of said traine and having y escape passages at their upper extremities, the lower g @emes edge of the said supplemental screen section frame and serving tostiffen the upper portion being carried downward to a, point materiell of the screen body, substantially as described. 10 below the upper bar of said frame, and a. pan' In testimony whereof I aflix my signature of separately formed clamping bars engaging in presence of two witnesses.

and securing the uyper edge of the mam body HENRY A. HANSON. screen to the said ower edge of saidsupplemental screen section, thesaid clamping bars being secured at their ends to the sides of said l Witnesses:

H. N. RosEwooD, A. S'rnoMs'rAD. 

